Summary

The analytical equations for multilayer adsorption isotherms of binary gas mixtures on heterogeneous solid surfaces are derived by using the well-known integral equation. These equations were obtained from the generalized Tóth and Freundlich isotherms (i. e., extended pure-gas Tóth and Freundlich isotherms to monolayer adsorption of binary gas mixtures), when the multilayer adsorption isotherm of Gonzalez and Holland was used to describe the local adsorption of binary gas mixtures. One of the derived multilayer adsorption isotherms has been applied to examine the experimental adsorption isotherms of hydrocarbons on charcoal (Nuxit-AL). The obtained numerical parameters have been compared with the parameters characterizing the monolayer adsorption, which were presented in the first part of this paper.